package com.abel.quiz.common;/**
 * Created by abel.lin on 2017/9/4.
 */

/**
 * @author abel.lin
 * @date_time 2017/9/4 17:05
 * @description
 */
public class EncryptUtil {
    private static String encode(byte[] source) {
        String s = null;
        char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
        try {
            java.security.MessageDigest md = java.security.MessageDigest.getInstance("MD5");
            md.update(source);
            byte tmp[] = md.digest();
            char str[] = new char[16 * 2];
            int k = 0;
            for (int i = 0; i < 16; i++) {
                byte byte0 = tmp[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            s = new String(str);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return s;
    }

    public static String MD5(String source) {
        return (source == null || "".equals(source)) ? "" : encode(source.getBytes());
    }

    public static void main(String[] args) {
        System.out.println(MD5("123"));
    }

}
